Face mask



FIG. 1 is a perspective view of a face mask, embodying our new design;

FIG. 2 is a front plan view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a top side view thereof; and,

FIG. 6 is a bottom side view thereof. 

The ornamental design for a face mask, as shown and described. 